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Finding the Fourth Proportional to 61,133.38, 91,713.90 and 21,690.54

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Solution

The fourth proportional to 61,133.38, 91,713.90 and 21,690.54 is: 32,540.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,133.38 : 91,713.90 = 21,690.54 : x
  2. Step 2: Convert to fraction form
    61,133.38/91,713.90 = 21,690.54/x
  3. Step 3: Cross multiply
    61,133.38x = 91,713.90 × 21,690.54
  4. Step 4: Simplify right side
    61,133.38x = 1,989,324,016.51
  5. Step 5: Solve for x
    x = 1,989,324,016.51/61,133.38
  6. Step 6: Final answer
    x = 32,540.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.